JPS6289122A - Computer device - Google Patents

Abstract

PURPOSE:To obtain the effective information to analyze the event and supervise and restore the facility by judging and outputting the generating sequence of plural condition change signals to occur in an input period DELTAt in the centralized supervisory and control system of the filter plant. CONSTITUTION:A process signal is accommodated through a process input device 2 to an input buffer 9 by a process fetching processing 8 at the timing of the period starting from a scheduler 18. A process condition changing processing 11 detects the condition change of the process equipment and the trouble occurring recovery by the comparison of a previous input buffer 10 and a present input buffer 9, reports the changing signal identifying data such as the status accommodating address through a QUEUING buffer 12 to an event occurring sequence judging processing 13 and rewrites the previous input buffer 10 by the present input buffer 9. A condition changing recording editing processing 15 edits the condition changing status information of a QUEUING buffer 14 to an output format in accordance with a constant 17 for editing, and outputs it to an announcement typewriter 3 and a displaying device 4.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention is directed to the monitoring and control system of water and sewage plants using a computer device, such as a monitoring and control system using a computer device for water and sewage plants.
When inputting failure occurrence recovery information periodically and outputting it to an announcement typewriter or display device in chronological order, the order of occurrence is determined by logically determining the same timing detection events that occur within a cycle unit time. The present invention relates to a monitoring control device that provides time-series guidance.

[Background of the invention]

As shown in Figure 1, digital signals (on/off) indicating the status, failure, and occurrence of the equipment can be input manually via the digital input module of the process input device, or via the interrupt input module. I was inputting it. According to these methods, in the case of digital input, scanning input is performed using a computer device at a cycle of unit time 'Δt, and the order of signal changes of the equipment that occur within one period of Δt is recognized. That was impossible. On the other hand, when detecting changes in equipment using interrupt signals, process interrupts are issued to the computer device in accordance with the order of changes, so if the process interrupts are processed using first-in, first-out (FiFO), which is one of the interrupt processing methods of the operating system of the computer device, process interrupts will occur. The order is recognizable. However, the FiFO method uses QUE
The interrupt factors are buffered using the QUEUING register and processed one after another.If a factor that exceeds the capacity (number of cases) of the QUEUING register occurs within a unit time and the register capacity is overflowed, the order recognition is performed. was not possible. Furthermore, this interrupt method not only significantly increases the overhead time of the operating system, but also requires a large number of interrupt modules, which increases system costs and makes it difficult for computer systems to centrally monitor a large amount of on/off information. That wasn't an effective method. In addition, publicly known examples include Public Technical Report Vo]
]9--2. There is N184-421.

[Purpose of the invention]

The purpose of the present invention is to record status changes that randomly occur in typewriters and display devices during processes, failure occurrence recovery, etc. in an online centralized monitoring system using a computer device, and to use it for failure analysis and maintenance operations. To guide the occurrence order of multiple events occurring within a scanning cycle unit time in chronological order without missing a record of the occurring events, and without increasing the system cost and operating system overhead. The objective is to provide a monitoring and recording device that does not require any monitoring.

[Summary of the invention]

The present invention is a centralized monitoring and control system using a computer device for a water treatment plant, in which the status of equipment is periodically input to the computer device using a digital signal input device, and the operation of a typewriter or display device is monitored. , when providing it as equipment maintenance information, by determining the order of occurrence of multiple state change signals that occur within the input period Δ and outputting it,
Computer equipment that provides useful information for event analysis, equipment monitoring, and recovery.

[Embodiments of the invention]

FIG. 1 shows an example of a process monitoring and control system using a computer device. Information on process 1 is obtained from a timer 7 at
The central processing unit 5 operates according to the basic scanning period of , and stores the data into the memory 6 via the process input device 2 . The central processing unit 5 detects a change in the status of plant equipment, occurrence of a failure, and recovery at the timing of storing it in the memory 6, and outputs it to the announcement typewriter 3 and display device 4 in chronological order.

FIG. 2 shows the configuration of a specific device of the embodiment.

The process signal is sent to the process input device 2 by the process import processing 8 at the timing of periodic activation from the scheduler 18.
Process state change processing 1 stored in the input buffer 9 via
1 detects a change in the state of the process equipment or a failure occurrence recovery by comparing the previous input buffer 10 and the current manual buffer 9, and outputs the change signal identification data such as the status storage address as an event via the QUEU ING buffer 12. A report is sent to the occurrence order determination process 13, and the previous manual buffer 10 is rewritten with the current manual buffer 9. The status change record editing process 15 edits the status change status information in the QUEUING buffer 14 into an output format according to the editing constant 17, and outputs it to the announcement typewriter 3 and display device 4.

Next, the detailed operation of the above-mentioned event order judgment process 13 will be explained using FIGS. 3 and 4.

As shown in FIG. 3, the decision register 16 is used for indexing the own status storage address of the process equipment to be considered, the processing level to be considered, and the status of related equipment.
4, related equipment status address and level, own status processing specific allowable timer value and own status processing standby timer remaining value for monitoring the allowable time for determining the order of event occurrence. As shown in FIG. 4, the event occurrence order judgment processing 13 indexes the QUEUING register 12 and the decision register 16, and determines whether or not its own status is in the related status of the decision register 16, and changes status depending on the consideration level, that is, the process It is determined whether the signal is independent or there is a relationship with other equipment. If there is a relationship, the status of the related process equipment is determined within the allowable monitoring time, and if the related status condition is met, the status of the process equipment changes or malfunctions. An output instruction for recovery from occurrence is given to the status change record g collection processing 15. In addition, if the related status conditions are not satisfied within the allowable monitoring time, the process equipment changes by additionally outputting the related status abnormality in addition to the status change record editing processing and output instruction information for failure recovery. Although it is detected, it is also possible to provide guidance when unmatching occurs in the interlocking conditions with related process equipment.8 [Effects of the Invention] According to the present invention, system cost and operating system overhead are increased. Guides can be provided on a real-time schedule without any hassle.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of an embodiment of the present invention, FIG. 2 is an embodiment diagram showing the configuration of the present invention, and FIGS. 3 and 4 are diagrams explanatory of detailed operations. 8... Process import processing, 11... Process state change processing, 13... Event occurrence order judgment processing, 15... State change record editing processing, 9, 10... Input buffer, 12°14. ...QUEUING buffer, 16...decision register.

Claims (1)

[Claims] 1. Using a process information input device from a group of facilities to be monitored, changes in conditions that occur randomly in the process, occurrence of failure, recovery, etc. are recorded in chronological order, and a display device or A computer device that guides the output device of a typewriter, which includes a built-in device for logically determining the order of occurrence of events such as a change in the state of the process, occurrence of a failure, etc. A computer device characterized by having a built-in computer and providing useful information for event analysis, equipment monitoring, and recovery.